Coronal-hole



noun, Astronomy.
1.
a part of the solar corona that appears dark on optical and x-ray images and is characterized by low temperature and low density.

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  • Coronalled

    [noun kawr-uh-nl, kor-; adjective kuh-rohn-l, kawr-uh-nl, kor-] /noun ˈkɔr ə nl, ˈkɒr-; adjective kəˈroʊn l, ˈkɔr ə nl, ˈkɒr-/ noun 1. a crown; coronet. 2. a garland. adjective 3. of or relating to a coronal. 4. Anatomy. 5. Phonetics. (of a speech sound) articulated with the tip of the tongue, especially in a retroflex position. […]

  • Coronally

    [noun kawr-uh-nl, kor-; adjective kuh-rohn-l, kawr-uh-nl, kor-] /noun ˈkɔr ə nl, ˈkɒr-; adjective kəˈroʊn l, ˈkɔr ə nl, ˈkɒr-/ noun 1. a crown; coronet. 2. a garland. adjective 3. of or relating to a coronal. 4. Anatomy. 5. Phonetics. (of a speech sound) articulated with the tip of the tongue, especially in a retroflex position. […]



  • Coronal-mass-ejection

    noun, Astronomy. 1. a large-scale solar event involving an ejection of hot plasma that may accelerate charged particles and travel as far as the earth’s orbit, preceded by a shock front that may create a magnetic storm on earth. Abbreviation: CME. noun 1. a cloud of particles ejected from the sun’s surface during a solar […]

  • Coronal plane

    coronal plane n. A vertical plane at right angles to a sagittal plane, dividing the body into anterior and posterior portions. Also called frontal plane.



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